As we know Verizon has announced the release of CDMA iPhone 4 today at 7 a.m. The Verizon iPhone 4 will be available for shipping from 18th February 2011. Now AT&T has announced a new feature using which you will be able to make unlimited calls to any mobile number. This indicates that AT&T wants to steal the show from Verizon Wireless. In order to subscribe to this feature you will need a qualifying voice plan with unlimited messaging. For unlimited messaging plan you have to pay $20 USD per month and for FamilyTalk plan you have to pay $30 USD per month.

Really its a good news for AT&T iPhone users as they will be able to make unlimited mobile to mobile calls on any carrier for free of cost. This feature is going to be available from today. Well, According to a survey, 26 percent of AT&T customers are planning to switch to the Verizon iPhone 4. The survey which was conducted by ChangeWave in January reports that 16 percent of AT&T customers are planning to switch to the Verizon iPhone 4.